G - Physics – 11 – B
Patent
G - Physics
11
B
352/21.2
G11B 27/10 (2006.01) G06F 11/20 (2006.01) G11B 19/12 (2006.01) G11B 19/28 (2006.01) G11B 27/00 (2006.01) G11C 29/00 (2006.01)
Patent
CA 2027992
A data processing system is disclosed having a direct access storage device (DASD) subsystem comprising a number of separate physical housings, each housing having a number of disk supporting spindles mounted therein. The velocity of rotation of the spindles within a housing is synchronized, and the rotational position of the spindles may be locked into a fixed relationship. When number N of disk supporting spindles are provided, spindle rotation is synchronized, and mirrored data files are written out of phase by 360/N degrees, thereby providing reduced latency time during a subsequent read operation, while at the same time providing data integrity through the use of redundant data files.
Glaser Thomas William
Greenberg Richard
Ottesen Hjalmar Holmboe
International Business Machines Corporation
Saunders Raymond H.
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